Microstructural Behavior and Mechanical Properties of Friction Stir Spot Welding of Dissimilar Aluminum Semi Solid Casting Sheets SSM2024 and SSM6061
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Abstract
Friction welding by using stir spot technique which was to design weld semi-solid aluminum castings with differenced types of SSM2024 and SSM6061. The welding factors were studied compose of rotation speeds (500, 1,000, and 1,400 rpm), the plunging rate (56, 112, and 224 mm/min), the tool shoulder plunge depths was employed 0.5 mm, and the constant dwell time for 10 sec. The rotated clockwise cylindrical welding was used. The results showed that the lamellar structure at the stir pin zone (SpZ) on the bottom revealed the combining of two materials cause of heat dissipation from the friction of welding tool. The highest result of weld shear force was 3.77 kN, at rotation speed of 500 rpm, and the plunging rate 56 mm/min. Whereas the lowest weld shear force was 1.51 kN, at rotation speed of 1,400 rpm, and the plunging rate 224 mm/min.
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References
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